CN111532014A - Automatic nesting printing machine and automatic nesting method - Google Patents
Automatic nesting printing machine and automatic nesting method Download PDFInfo
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- CN111532014A CN111532014A CN202010383613.3A CN202010383613A CN111532014A CN 111532014 A CN111532014 A CN 111532014A CN 202010383613 A CN202010383613 A CN 202010383613A CN 111532014 A CN111532014 A CN 111532014A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
- B41F15/08—Machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F15/00—Screen printers
- B41F15/14—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0036—Devices for scanning or checking the printed matter for quality control
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Abstract
The invention relates to the technical field of printing machines, in particular to an automatic nesting printing machine and an automatic nesting method. The automatic nesting printing machine provided by the embodiment of the invention comprises a printing assembly, an image acquisition device and a control device connected with the image acquisition device, wherein the printing assembly comprises a printing screen frame, a screen frame fixing device and a screen frame fine-tuning device, and the printing screen frame is arranged on the screen frame fixing device. The printing screen frame prints the mark patterns on the bedplate, when the bedplate printed with the mark patterns moves to the shooting range of the image acquisition device, the control device can acquire the offset between the mark patterns and the reference patterns according to the mark patterns and the reference patterns in the shot images, and the screen frame fine adjustment device can quickly and accurately adjust the position of the printing screen frame according to the offset. Therefore, the automatic registration printing machine and the automatic registration method provided by the embodiment of the invention have high registration precision.
Description
Technical Field
The invention relates to the technical field of printing machines, in particular to an automatic nesting printing machine and an automatic nesting method.
Background
Screen printing is a printing method that prints a pattern on a substrate using ink or dye through a printed pattern area on a frame. When in printing, a printing stock is placed on the bedplate, the printing stock sequentially passes through the lower part of the screen frame with the printing pattern along with the bedplate, the printing ink or dye passes through the unblocked meshes under the extrusion of the scraper so that the printing pattern is printed on the printing stock, and the target pattern is obtained by screen frame printing at different stations. Before the printing machine carries out printing processing, need with the screen frame initial installation of different stations on the printing arm that corresponds, but initial installation can't ensure the accurate nature of the screen printing pattern of different stations. Therefore, the printing machine needs to be positioned before printing, and batch processing production is carried out after the positioning is finished.
In the process of implementing the invention, the inventor finds that in the prior art, most of the existing printing machines adopt a manual nesting method to perform nesting, the nesting difficulty is high, and the nesting efficiency is low; the existing automatic nesting printing machine has the problems of relatively complex structure, low nesting precision and the like.
Disclosure of Invention
In order to solve the problem of low registration accuracy of the conventional printing machine, embodiments of the present invention provide an automatic registration printing machine and an automatic registration method, which can obtain an offset between a mark pattern and a reference pattern generated by a printing screen frame, and adjust the position of the printing screen frame according to the obtained offset.
In order to solve the technical problem, the following technical solutions are provided in the embodiments of the present invention:
in a first aspect, an embodiment of the present invention provides an automatic nesting printing machine, where the automatic nesting printing machine includes: the printing device comprises a machine frame, a printing arm, a printing assembly, a bedplate, an image acquisition device and a control device, wherein the printing arm is arranged on the machine frame, the printing assembly is arranged on the printing arm, and the image acquisition device is in communication connection with the control device; wherein the content of the first and second substances,
the printing component comprises a printing screen frame, a screen frame fixing device and a screen frame fine-tuning device, the printing screen frame is arranged on the screen frame fixing device, and the screen frame fine-tuning device is used for adjusting the position of the printing screen frame on the screen frame fixing device;
the image acquisition device is arranged above the bedplate;
the control device is used for:
controlling the printing screen frame to generate a marking pattern on the platen;
acquiring an image with the mark pattern acquired by the image acquisition device;
acquiring the offset between the mark pattern and a reference pattern according to the image;
and controlling the screen frame fine-tuning device to adjust the position of the printing screen frame according to the offset.
Optionally, the reference pattern includes a preset pattern in an image captured by the image capturing device.
Optionally, the automatic nesting printing machine further comprises a reference printing assembly, and the reference printing assembly is arranged on the printing arm;
the control device is further configured to:
controlling the fiducial printing assembly to produce the fiducial pattern on the platen.
Optionally, the reference printing assembly comprises a digital printing machine;
or, the printing component comprises a printing screen frame and a screen frame fixing device, and the printing screen frame is arranged on the screen frame fixing device.
Optionally, the reference pattern comprises at least two reference positions for adjusting the position of the printing frame in the X-axis, Y1-axis and Y2-axis directions.
Optionally, the marker pattern comprises a cross pattern or a cross circle pattern.
Optionally, the screen frame fine adjustment device comprises a first fine adjustment device and a second fine adjustment device, and the first fine adjustment device and the second fine adjustment device are respectively arranged at two ends of the printing arm;
the screen frame fixing device comprises a first supporting seat and a second supporting seat, the first supporting seat is arranged on the first fine adjustment device, and the second supporting seat is arranged on the second fine adjustment device;
two ends of the printing screen frame are respectively fixed on the first supporting seat and the second supporting seat;
first micromatic setting includes Y1 axle trimmer motors, second micromatic setting includes Y2 axle trimmer motors, first micromatic setting and/or second micromatic setting includes X axle trimmer motors, controlling means is through control X axle trimmer motors Y1 axle trimmer motors with Y2 axle trimmer motors adjust respectively the position of printing screen frame in X axle, Y1 axle and Y2 axle direction.
In a second aspect, an embodiment of the present invention provides an automatic registration method, which is applied to an automatic registration printing machine, where the automatic registration printing machine includes an image acquisition device and a plurality of printing frames;
the method comprises the following steps:
printing a marking pattern on the corresponding printing stock through the plurality of printing frames;
forming the same reference pattern on the corresponding printing stock;
sequentially acquiring the mark pattern and the reference pattern on the corresponding printing stock through the image acquisition device;
acquiring the offset between the corresponding mark pattern and the reference pattern;
and sequentially adjusting the positions of the plurality of printing screen frames according to the corresponding offset.
Optionally, the forming the same reference pattern on the corresponding substrate includes:
forming the fiducial pattern on the substrate by the image capture device.
Optionally, the forming the same reference pattern on the corresponding substrate includes:
printing the reference pattern on the platen.
The beneficial effects of the embodiment of the invention are as follows: different from the situation of the prior art, the automatic nesting printing machine provided by the embodiment of the invention comprises a printing assembly, an image acquisition device and a control device connected with the image acquisition device, wherein the printing assembly comprises a printing screen frame, a screen frame fixing device and a screen frame fine-tuning device, and the printing screen frame is arranged on the screen frame fixing device. The printing screen frame prints the mark patterns on the bedplate, when the bedplate printed with the mark patterns moves to the shooting range of the image acquisition device, the control device can acquire the offset between the mark patterns and the reference patterns according to the mark patterns and the reference patterns in the shot images, and then the screen frame fine adjustment device can quickly and accurately adjust the position of the printing screen frame according to the offset. Therefore, the automatic nesting printing machine and the automatic nesting method provided by the embodiment of the invention have the advantages of high nesting precision and high nesting speed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic structural diagram of an automatic registration printing machine according to an embodiment of the present invention;
FIG. 2a is a schematic view of a printed pattern product according to an embodiment of the present invention;
FIG. 2b is a schematic view of a set of platens having a pattern of marks printed thereon according to one embodiment of the present invention;
FIG. 2c is a schematic view of another embodiment of the present invention providing a set of platens having a pattern of indicia printed thereon;
FIG. 3 is an enlarged view at A in FIG. 1;
fig. 4 is a schematic diagram of an image captured by an image capturing device according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an automatic registration printing machine according to an embodiment of the present invention;
FIG. 6 is a flow chart of an automatic registration method according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a control assembly according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Furthermore, the references to "horizontal" and "vertical" etc. indicate that the orientation or positional relationship is based on that shown in the drawings for the purpose of describing the invention or facilitating the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
The stations of the automatic registration printing machine in the embodiment of the invention can be oval or linear, and the following embodiment takes an oval automatic registration printing machine with oval stations as an example for explanation.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an automatic registration printing machine according to an embodiment of the present invention. As shown in fig. 1, the automatic nesting printing machine includes a frame 1, a printing arm 2, a platen 3, a printing component 4, an image capturing device 5, and a control device (not shown), wherein the frame 1 includes a frame foot (not shown) and a fixing arm 7 fixed on the frame foot, one end of the printing arm 2 is hinged to the lower portion of the fixing arm 7, the printing component 4 is connected to the printing arm 2, and the printing arm 2 drives the printing component 4 to lift or press down through lifting or pressing down of the printing arm 2. The printing arm 2 is connected to a drive (not shown), and the printing arm 2 is lifted by the drive of the drive. The printing arm 2 and the bedplate 3 are arranged at the periphery of the fixing arm 7 at intervals, the bedplate 3 is positioned below the printing arm 2, and the bedplate 3 is in sliding fit with the machine frame 1.
Specifically, the driving device may be a cylinder, a piston rod of the cylinder extends from one end of a cylinder body of the cylinder and is hinged to the upper end of the fixing arm 7, and the other end of the cylinder body of the cylinder is hinged to the middle of the printing arm 2 and is in sliding fit with the printing arm 2 along the length direction of the printing arm 2.
In some embodiments, the automatic nesting printing machine further comprises an extension spring (not shown), one end of the extension spring is connected to the middle of the fixing arm 7, and the other end of the extension spring is connected with the printing arm 2 through an adjusting plate (not shown), and the adjusting plate and the printing arm 2 can be installed in a matching manner to change relative positions. The lifting or pressing action of the printing arm 2 can be buffered through the elasticity and the buffering action of the extension spring, the vibration amplitude of the printing arm 2 is reduced, and therefore the influence of the vibration of the printing arm 2 on the registration precision is weakened.
The printing component 4 in the embodiment of the invention comprises a scraper, a printing screen frame, a screen frame fixing device and a screen frame fine-adjustment device, wherein the screen frame fixing device is fixedly connected with the printing arm 2, the printing screen frame is arranged on the screen frame fixing device, and the screen frame fine-adjustment device is used for adjusting the position of the printing screen frame on the screen frame fixing device. The printing frame is horizontally mounted between a doctor blade, which may be mounted on the printing arm 2 via a guide rail, and a platen 3. The screen in the printing frame is usually made of nylon, glass, polyester, silk or metal mesh, and the mesh of the printing pattern area on the screen is through holes which can be penetrated by ink or dye, but the mesh of the non-printing pattern area is blocked and cannot be penetrated by ink. The printing pattern area on the silk screen comprises a pattern ink leakage area to be printed and a marking pattern ink leakage area. Scraping ink or slurry through an ink leaking area of the pattern to be printed and/or an ink leaking area of the marking pattern by a scraper so as to print the pattern to be printed and/or the marking pattern on a printing stock; after the scraper finishes scraping one screen frame, the printing arm 2 is lifted up, the screen frame and the scraper are further lifted, and the next bedplate 3 enters the station of the scraper from the previous station, so that patterns are printed on the printing stock of the next bedplate 3.
The automated registering printing machine may include a plurality of platens 3, and in some embodiments, an image capture device 5 is disposed above one of the platens 3; alternatively, in some embodiments of the invention, the image capture device 5 may be disposed above the platen 3 of the last station. The image acquisition device 5 is connected with the control device, and optionally, the image acquisition device 5 can be a CCD sensor. The image acquisition device 5 is used for shooting the image of the mark pattern printed on the bedplate 3 by the printing component 4, the control device analyzes the offset between the mark pattern and the reference pattern according to the image of the mark pattern shot by the image acquisition device 5, and controls the screen frame fine-tuning device to adjust the position of the printing screen frame on the screen frame fixing device according to the offset. The position of the marking pattern and the position of the reference pattern have deviation, and the control device sends out a control signal to enable the screen frame fine-tuning device to adjust the position of the printing screen frame; if the offset amount is 0, there is no deviation in the positions of the mark pattern and the reference pattern, and the frame fine adjustment device does not need to adjust the position of the printing frame.
A finished printed design usually includes partial designs of different colors, and one screen frame can only print one color, so when the design to be printed includes multiple colors, multiple screen frames are required to cooperate to print the final finished printed design. Therefore, an automatic register printing machine usually comprises a plurality of printing assemblies 4, each printing assembly is used for printing partial patterns with different colors, and in order to enable the partial patterns of each printing assembly 4 to be printed at preset positions, the position of a printing screen frame on each printing assembly needs to be automatically corrected before formal printing. Please refer to fig. 2a and fig. 2b, wherein fig. 2a is a schematic diagram of a finished printed pattern product according to an embodiment of the present invention; fig. 2b is a schematic view of a plurality of platens 3 printed with a pattern of marks according to an embodiment of the present invention. As shown in fig. 2a and 2b, the petal pattern in the finished product of the printed pattern consists of six petals with different colors, and six printing assemblies 4 with different colors are required to be matched with printing to print a complete petal pattern on a printing stock, so that ink leaking areas with different petal patterns are required to be preset on a printing screen frame of each printing assembly, and then six petals are printed on the same printing stock in sequence. Moreover, the positions of the ink leaking areas of the six petal patterns need to be corrected one by one before printing.
When the position of the printing screen frame is corrected, the actual printing pattern on the printing screen frame needs to be printed on the bedplate 3, the image of the actual printing pattern on the bedplate 3 is obtained through the image acquisition device 5, and the offset between the position of the actual printing pattern and the reference position is analyzed according to the image of the actual printing pattern. When the actual printed pattern is large in size or the design is relatively complicated, if the offset amount of the actual printed pattern is directly obtained, the obtained offset amount may have a large error. Therefore, the mark pattern is adopted in the embodiment of the invention to indirectly analyze the offset of the actual printing pattern. In order to improve the registration accuracy of the automatic registration printing machine, in some embodiments, the reference pattern comprises at least two reference positions, i.e. the number of the marker patterns and the reference patterns is two or more. When the number of the mark patterns (reference patterns) is two, two mark pattern ink leaking regions (reference pattern ink leaking regions) are respectively located at both ends of the printing screen frame, and the control device controls the screen frame fine adjustment device to adjust the positions of the printing screen frame in the X-axis, Y1-axis and Y2-axis directions according to the offset between the two mark patterns formed on the platen 3 by the printing screen frame and the corresponding reference patterns.
Specifically, in some embodiments of the present invention, the two mark pattern ink leakage areas are a mark pattern ink leakage area 1 and a mark pattern ink leakage area 2, respectively, the mark pattern ink leakage area 1 is located at a first end of the screen frame, and the mark pattern ink leakage area 2 is located at a second end of the screen frame, where the first end and the second end are opposite to each other. The mark pattern ink leakage area 1 forms a mark pattern 1 on the platen 3, and the mark pattern ink leakage area 2 forms a mark pattern 2 on the platen 3. The control means may adjust the position of the printing frame in the X-axis direction according to the shift of the marker pattern 1 or the marker pattern 2 in the X-axis direction, adjust the position of the first end according to the shift of the marker pattern 1 in the Y1 axis, and adjust the position of the second end according to the shift of the marker pattern 2 in the Y2 axis.
Alternatively, when the number of the mark patterns printed on the platen 3 is three, the control means may rotate the printing frame clockwise or counterclockwise along the Z-axis perpendicular to the plane formed by the X-axis and the Y1 (or the Y2-axis) according to the obtained offset angle between a first angle formed by the three mark patterns and a corresponding second angle formed by the three reference patterns, thereby finely adjusting the position of the printing frame.
Specifically, the marking pattern can be a cross pattern and/or a cross circle pattern and/or a hollow circle pattern and/or a solid circle pattern, and is selected to be used according to the requirement. At this time, the printing screen frame is simultaneously provided with an actual printing pattern ink leaking area and a marking pattern ink leaking area, the marking pattern ink leaking area is located in a fixed area near the actual printing pattern ink leaking area, and after the marking pattern is printed on the bedplate 3 through the printing screen frame, the relative position of the marking pattern and the actual printing pattern is kept unchanged, so that the adjustment of the actual printing pattern can be completed according to the marking pattern. Fig. 2b and 2c illustrate a cross-shaped circle pattern as an example. For example, in fig. 2b, the actual printed pattern is a petal in the figure, in order to facilitate analysis of the offset between the current position and the actual position of the petal, at least one cross-shaped circle pattern is arranged at a preset position around the petal, and the offset between the current position and the reference position of the cross-shaped circle pattern is the offset between the current position and the reference position of the petal.
In addition, in some embodiments, the number, location and size of the marker pattern ink bleed areas provided on each printing frame are the same. In order to make the offset amount acquired by the image pickup device 5 more accurate, an image of each mark pattern on one platen needs to be acquired by one corresponding image pickup device 5, and each mark pattern may be located below the corresponding image pickup device 5. For example, in fig. 2c, two marking patterns printed on the platen 3 are respectively located on two sides of the platen 3, and each platen 3 printed with a marking pattern needs two image capturing devices 5 to respectively obtain images of the two marking patterns, and since the number and positions of the ink leaking regions of the marking patterns arranged on each printing screen frame are the same, the positions of the marking patterns printed on the platen 3 by each printing screen frame are close, so that the controller can accurately adjust the positions of all the printing screen frames according to the images captured by the two image capturing devices 5. The image acquisition devices 5 are in a group, after the mark patterns and the reference patterns are formed on each bedplate 3, the bedplate is transferred to the lower part of the image acquisition device 5, the image acquisition devices 5 respectively acquire image data for each bedplate 3, only one group of image acquisition devices 5 are used in the whole set of positions, the mark patterns and the reference patterns are arranged at two opposite ends of the bedplate 3, the position of the image acquisition devices 5 is relatively fixed, and the image data can be acquired when different bedplates 3 are moved to the lower part of the image acquisition devices 5.
In the actual registration process, the size of the mark pattern is generally small, while the size of the actual printed pattern is relatively large, and since the position of the printing frame is corrected only by referring to the offset amount of the mark pattern, only the mark pattern needs to be printed on the platen 3, and the actual printed pattern does not need to be printed. Therefore, it is necessary to block the mesh of the actual printing pattern bleed area on the printing frame or to scrape the ink only in the marking pattern bleed area before correcting the position of the printing frame. For example, in fig. 2c, only the pattern of marks is printed on the platen 3. In addition, if the actual printed pattern is also printed on the platen 3 during the registration process, ink or paste used for printing is wasted, and the platen 3 is contaminated.
In some embodiments, the reference pattern includes a preset pattern in the patterns captured by the image capturing device 5, and when at least one of the platens 3 printed with the mark patterns sequentially moves to the platen 3 below the image capturing device 5, the image capturing device 5 sequentially obtains an image of each mark pattern, and since the image also includes the preset pattern (which may also be the position center of the image capturing device 5), the preset pattern is used as the reference pattern, and the control device can correct the position of the printing frame only according to the image of the mark pattern. When the preset image in the image pickup device 5 is taken as a reference pattern, at least two printing units 4 are provided. In other embodiments, the automatic nesting printing machine further comprises a reference printing assembly, which is arranged on the fixed arm 7 or the printing arm 2, for printing a reference pattern on the platen 3, the reference printing assembly being connected to the control device. The controller is used for controlling the printing device and the reference printing device to print the mark pattern and the reference pattern on the same platen 3 respectively. At this moment, the control device can more conveniently and intuitively acquire the offset between the mark pattern and the reference pattern according to the image of the mark pattern and the reference pattern printed on the bedplate 3 shot by the image acquisition device 5, the acquired offset is more accurate, and then the screen frame fine adjustment device can quickly and accurately adjust the position of the printing screen frame according to the offset.
In some embodiments, as shown in fig. 1, the reference printing element may be a digital printer 6, the digital printer 6 having a nozzle (not shown) for jet printing, which is opposite the platen 3, and which can jet print a pattern at a predetermined position as desired. When the reference printing element is a digital printer 6, at least one of the printing elements 4 is printed. When the benchmark printing component is the digital printing machine 6, the traditional screen printing is combined with the digital printing, the advantages of the traditional screen printing can be utilized to print the bottom layer patterns of the large area of the printing stock, the digital ink jet is utilized to print the small area and the spot property, the plate making is not needed, the advantages of various modes are reasonably played, the fine patterns are formed by the aid of high speed and high efficiency, and the printing effect is good. Optionally, in other embodiments, the reference printing assembly comprises a printing frame and a frame fixture to which the printing frame is mounted. The structure of the reference printing element may be the same as that of the printing element 4, and in some embodiments, one printing element 4 may be selected, and the position of the frame in the printing element 4 is corrected, so that the corrected printing element 4 serves as the reference printing element, where at least two printing elements 4 are provided.
Referring to fig. 3, fig. 3 is an enlarged view of a portion a in fig. 1, and as shown in fig. a, the screen frame fixing device includes two first supporting seats (not shown) and two second supporting seats (not shown), the screen frame fine-tuning device includes a first fine-tuning device 21 and a second fine-tuning device 22, the first fine-tuning device 21 and the second fine-tuning device 22 are respectively disposed at two ends of the printing arm 2, the two first supporting seats are connected to the first fine-tuning device 21, the two second supporting seats are connected to the second fine-tuning device 22, one end of the printing screen frame is fixed to the two first supporting seats, and the other end of the printing screen frame is fixed to the two second supporting seats.
In some embodiments, the first fine adjustment device comprises an X1 axis fine adjustment device, a Y1 axis fine adjustment device and a Z1 axis fine adjustment device, and the X1 axis fine adjustment device, the Y1 axis fine adjustment device and the Z1 axis fine adjustment device are respectively used for driving the two first supporting seats to move along an X1 axis direction, a Y1 axis direction and a Z1 axis direction; the second fine adjustment device comprises an X2 axis fine adjustment device, a Y2 axis fine adjustment device and a Z2 axis fine adjustment device, and the X2 axis fine adjustment device, the Y2 axis fine adjustment device and the Z2 axis fine adjustment device are respectively used for driving the two second supporting seats to move along the X2 axis direction, the Y2 axis direction and the Z2 axis direction. The Y1 axis fine adjustment device and the Y2 axis fine adjustment device are connected with the control device, and the control device is used for controlling the Y1 axis fine adjustment device and the Y2 axis fine adjustment device. The X1 axle fine adjustment device or the X2 axle fine adjustment device is connected with the control device.
Further, in some embodiments, the X1 axis fine tuning device and/or the X2 axis fine tuning device comprises an X axis fine tuning motor, and the Y1 axis fine tuning device and the Y2 axis fine tuning device comprise a Y1 axis fine tuning motor and a Y2 axis fine tuning motor, respectively; the X1 axle fine-tuning device drives two first supporting seats and two second supporting seats to move along the X axle direction through an X axle fine-tuning motor, the Y1 axle fine-tuning device drives two first supporting seats to move along the Y1 axle direction through a Y1 axle fine-tuning motor, and the Y2 axle fine-tuning device drives two second supporting seats to move along the Y2 axle direction through a Y2 axle fine-tuning motor. The X-axis fine tuning motor, the Y1-axis fine tuning motor and the Y2-axis fine tuning motor are respectively connected with the control device. The control device can acquire the offset of the marking pattern in the X-axis direction, the Y1-axis direction and the Y2-axis direction according to the image shot by the image acquisition device 5, and control the rotation of the X-axis fine adjustment motor according to the acquired offset to regulate and control the displacement of the first supporting seat and the second supporting seat along the X-axis direction, and regulate and control the displacement of the first supporting seat along the Y1-axis direction by controlling the rotation of the Y1-axis fine adjustment motor, and regulate and control the displacement of the second supporting seat along the Y2-axis direction by controlling the rotation of the Y2-axis fine adjustment motor.
Referring to fig. 4, fig. 4 is a schematic diagram of an image captured by the image capturing device 5 according to an embodiment of the present invention, in which the number of the mark patterns and the reference patterns in fig. 4 are two, and each of the mark patterns and the reference patterns is markedThe pattern 12 is close to the Y1 axis trimmer motor, and the offset between the marker pattern 12 and the corresponding reference pattern 11 is: offset a mm to the right along the X axis and b along the Y1 axis1Millimeter; the mark pattern 22 approaches the Y2 axis trimmer motor, and the offset between the mark pattern 22 and the corresponding reference pattern 21 is: offset a mm to the right along the X axis and b along the Y2 axis2And (4) millimeter. The Y1 shaft fine tuning motor drives the first supporting seat to move m along the Y1 shaft direction1The Y2 axis fine tuning motor drives the second support seat to move m along the Y2 axis direction2. The control means may be according to b1And b2M is calculated by the following formula1And m2The numerical value of (A):
m1＝k1·b1
m2＝k2·b2
wherein k is1Is a Y1 axis correction factor, k2Is a Y2 axis correction factor. Alternatively, in some embodiments of the invention, 0 < k11 or less and k is 0 or more2≤1。
The control device calculates m1And m2After the numerical value is obtained, the first supporting seat and the second supporting seat are driven to synchronously move a millimeter to the left along the X axis by controlling the X-axis fine tuning motor, and the first supporting seat is driven to move m upwards along the Y1 axis by controlling the Y1-axis fine tuning motor1Mm, and controlling a Y2 shaft fine tuning motor to drive the second supporting seat to move m upwards along the Y2 shaft2And the millimeter size is larger than the millimeter size, so that the rapid and accurate registration of the automatic registration printing machine is finally realized.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an automatic nesting printing apparatus according to an embodiment of the present invention, as shown in fig. 5, in some embodiments, the automatic nesting printing apparatus further includes a human-machine interface connected to the control device, and the human-machine interface may be used to manually input parameters to adjust the positions of the screen frame relative to the screen frame fixing device in the X axis, the Y1 axis, and the Y2 axis. The control device in the embodiment of the present invention includes a PLC controller, and the control device controls at least one printing unit 4 through the PLC controller. Optionally, the control device further comprises image analysis software, the image acquisition device 5 shoots an image of the marked pattern, and sends the image of the marked pattern to the image analysis software, the image analysis software acquires the offset between the marked pattern and the reference pattern according to the image of the marked pattern, and converts the offset into an electric signal (pulse signal) to be sent to the PLC controller, so that the PLC controller controls a fine tuning motor in a screen frame fine tuning device in each printing assembly 4 to adjust the position of the printing screen frame, the accuracy is reliable, the position is in place at one step, the influence of human factors is avoided, the efficiency is high, and the effect is good. The printing screen frames at different stations all use the reference pattern as a reference, the reference is unified, then image data are collected in a unified mode through the image collecting device 5, the offset of the marking pattern and the reference pattern is converted into an electric signal to control a fine adjustment motor, the mechanical automation degree is high, and the register position is fast and accurate.
After the positions of the screen frames are corrected, the meshes of the marking pattern area are blocked, and when the production process printing is carried out, only the pattern to be printed is printed on a printing stock (such as cloth or finished clothes), but the marking pattern is not printed. For example, the mesh of the ink leakage area of the marking pattern can be blocked by sticking a transparent adhesive on the ink leakage area of the marking pattern.
The automatic nesting printing machine provided by the embodiment of the invention comprises at least one printing component 4, an image acquisition device 5 and a control device connected with the image acquisition device 5, wherein the printing component 4 comprises a printing screen frame, a screen frame fixing device and a screen frame fine-tuning device, and the printing screen frame is arranged on the screen frame fixing device. When the bedplate 3 printed with the mark patterns moves to the shooting range of the image acquisition device 5, the control device can acquire the offset between the mark patterns and the reference patterns according to the mark patterns and the reference patterns in the shot images, the acquired offset is relatively accurate, and then the screen frame fine adjustment device can quickly and accurately adjust the position of the printing screen frame according to the offset. Therefore, the automatic nesting printing machine provided by the embodiment of the invention has high nesting precision.
Referring to fig. 6, fig. 6 is a flowchart illustrating an automatic registration method according to an embodiment of the present invention, as shown in fig. 6, in some embodiments, a control device is configured to perform the following method steps:
s11, printing a marking pattern on the corresponding printing stock through the plurality of printing frames;
s12, forming the same reference pattern on the corresponding printing stock;
s13, sequentially acquiring the mark pattern and the reference pattern on the corresponding printing stock through the image acquisition device;
s14, acquiring the offset between the corresponding mark pattern and the reference pattern;
and S15, sequentially adjusting the positions of the printing screen frames according to the corresponding offset.
The printing stock in the embodiment of the invention can be the bedplate 3, the cloth or the finished clothes, when the printing stock is the bedplate 3, the cloth or the finished clothes for automatic nesting can be avoided, and the waste of the cloth and the finished clothes can be avoided by utilizing the existing bedplate 3 structure. The marker pattern and the reference pattern may be grouped by two or three, and preferably, they are grouped by two. Each marking pattern is adjusted by taking the reference pattern as a reference, so that the registration can be quickly realized, and the accuracy is high.
In step S12, the reference pattern formed on the corresponding printing material may be formed by a digital printing machine, may be formed by printing screen frame ink scraping printing at a later station, or may be formed by directly using a preset pattern of the image capturing device 5 as the reference pattern. When the digital printing machine or the printing screen frame forms the reference pattern, the forming sequence of the marking pattern and the reference pattern can be changed.
Step S15 further includes: and converting each offset into a corresponding electric signal and sending the electric signal to a PLC (programmable logic controller) so that the PLC controls a corresponding fine tuning motor to adjust the position of the printing screen frame. The fine adjustment motor for adjusting each printing screen frame comprises an X-axis fine adjustment motor, a Y1-axis fine adjustment motor and a Y2-axis fine adjustment motor.
Referring to fig. 7, in some embodiments, the control device includes: one or more processors 410 and a memory 420, with one processor 410 being an example in fig. 7.
The processor 410 and the memory 420 may be connected by a bus or other means, such as by a bus in FIG. 6.
The memory 420 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the instant message alert device, and the like. Further, the memory 420 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, the memory 420 may optionally include memory located remotely from the processor 410, which may be connected to the instant message reminder device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules stored in the memory 420, when executed by the one or more processors 410, perform the automatic registration method in any of the method embodiments described above, e.g., performing the method steps S11-S15 of fig. 6 described above.
The product can execute the method provided by the embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a general hardware platform, and certainly can also be implemented by hardware. It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a computer readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides an automatic cover position calico printing machine which characterized in that, automatic cover position calico printing machine includes: the printing device comprises a machine frame, a printing arm, a printing assembly, a bedplate, an image acquisition device and a control device, wherein the printing arm is arranged on the machine frame, the printing assembly is arranged on the printing arm, and the image acquisition device is in communication connection with the control device; wherein the content of the first and second substances,
the printing component comprises a printing screen frame, a screen frame fixing device and a screen frame fine-tuning device, wherein the printing screen frame is arranged on the screen frame fixing device, and the screen frame fine-tuning device is used for adjusting the position of the printing screen frame on the screen frame fixing device;
the image acquisition device is arranged above the bedplate;
the control device is used for:
controlling the printing screen frame to generate a marking pattern on the platen;
acquiring an image with the mark pattern acquired by the image acquisition device;
acquiring the offset between the mark pattern and a reference pattern according to the image;
and controlling the screen frame fine-tuning device to adjust the position of the printing screen frame according to the offset.
2. The automatic nesting printing machine of claim 1, wherein said reference pattern comprises a preset pattern in an image captured by said image capture device.
3. The automatic nesting printing machine of claim 1, further comprising a reference printing assembly disposed on said printing arm;
the control device is further configured to:
controlling the fiducial printing assembly to produce the fiducial pattern on the platen.
4. The automatic register printing machine of claim 3, wherein the reference printing assembly comprises a digital printing machine;
or, the benchmark printing assembly comprises a printing screen frame and a screen frame fixing device, and the printing screen frame is arranged on the screen frame fixing device.
5. The automatic registration printer of any one of claims 1-4, wherein the reference pattern comprises at least two reference positions for adjusting the position of the printing frame in the X, Y1 and Y2 axes.
6. An automatic registration printing machine according to claim 5, wherein said pattern of markings comprises a cross pattern or a cross circle pattern.
7. The automatic nesting printing machine of claim 5, wherein said frame fine adjustment means comprises a first fine adjustment means and a second fine adjustment means, said first fine adjustment means and said second fine adjustment means being respectively disposed at both ends of the printing arm;
the screen frame fixing device comprises a first supporting seat and a second supporting seat, the first supporting seat is arranged on the first fine adjustment device, and the second supporting seat is arranged on the second fine adjustment device;
two ends of the printing screen frame are respectively fixed on the first supporting seat and the second supporting seat;
first micromatic setting includes Y1 axle trimmer motors, second micromatic setting includes Y2 axle trimmer motors, first micromatic setting and/or second micromatic setting includes X axle trimmer motors, controlling means is through control X axle trimmer motors Y1 axle trimmer motors with Y2 axle trimmer motors adjust respectively the position of printing screen frame in X axle, Y1 axle and Y2 axle direction.
8. An automatic nesting method is applied to an automatic nesting printing machine and is characterized in that the automatic nesting printing machine comprises an image acquisition device and a plurality of printing screen frames;
the method comprises the following steps:
printing a marking pattern on the corresponding printing stock through the plurality of printing frames;
forming the same reference pattern on the corresponding printing stock;
sequentially acquiring the mark pattern and the reference pattern on the corresponding printing stock through the image acquisition device;
acquiring the offset between the corresponding mark pattern and the reference pattern;
and sequentially adjusting the positions of the plurality of printing screen frames according to the corresponding offset.
9. The automatic registration method of claim 8, wherein the forming the same fiducial pattern on the corresponding substrate comprises:
forming the fiducial pattern on the substrate by the image capture device.
10. The automatic registration method of claim 8, wherein the forming the same fiducial pattern on the corresponding substrate comprises:
printing the reference pattern on the platen.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010383613.3A CN111532014A (en) | 2020-05-08 | 2020-05-08 | Automatic nesting printing machine and automatic nesting method |
| PCT/CN2020/134582 WO2021223433A1 (en) | 2020-05-08 | 2020-12-08 | Automatic registration printing machine and automatic registration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010383613.3A CN111532014A (en) | 2020-05-08 | 2020-05-08 | Automatic nesting printing machine and automatic nesting method |
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| CN111532014A true CN111532014A (en) | 2020-08-14 |
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| CN202010383613.3A Pending CN111532014A (en) | 2020-05-08 | 2020-05-08 | Automatic nesting printing machine and automatic nesting method |
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| CN (1) | CN111532014A (en) |
| WO (1) | WO2021223433A1 (en) |
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| CN113043723A (en) * | 2021-03-26 | 2021-06-29 | 广州诚鼎机器人有限公司 | Screen frame nesting method |
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